/*
 * Copyright 2020-2023 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.javaer.jany.format;

import java.lang.annotation.*;

/**
 * @author cn-src
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.FIELD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE})
public @interface StringFormat {

    boolean apply() default true;

    boolean trim() default true;

    boolean emptyToNull() default true;

    interface Formatter {
        static String format(final String str, final StringFormat format) {
            String value = str;
            if (null != format && format.apply()) {
                if (format.trim()) {
                    value = value.trim();
                }
                if (format.emptyToNull() && value.isEmpty()) {
                    return null;
                }
            }
            return value;
        }
    }
}